Unit 1

1. Unit 1 Darwin’s big ideas and ways of working Darwin’s big ideas and ways of working: Unit 1 Darwin’s big ideas and ways of working: Unit 1

2. High ratio of increase and Struggle for life Darwin’s weed patch experiment Darwin’s big ideas and ways of working: Unit 1 Darwin’s big ideas and ways of working: Unit 1

3. Eggs or very young animals seem generally to suffer most because they are competing with established organisms High ratio of increase and Struggle for life http://www.arkive.org/common-frog/rana-temporaria/image-A8918.html http://www.arkive.org/robin/erithacus-rubecula/image-A9289.html Darwin’s big ideas and ways of working: Unit 1

4. Inheritance and variability Pollination - bees transfer pollen and pollen carries the potential for variability in plants Darwin’s big ideas and ways of working: Unit 1

5. Darwin grew 54 varieties of the Cabbage family in his kitchen garden Inheritance and variability Darwin’s big ideas and ways of working: Unit 1

6. Making Connections What is the connection between these organisms? Bumble bee Red clover Cats Field Mouse Darwin’s big ideas and ways of working: Unit 1

7. Darwin made collections and noticed the variability amongst the individuals he collected Inheritance and variability Darwin’s big ideas and ways of working: Unit 1

8. Life Cycles Seed to seed Some don’t survive even in a pod Darwin’s big ideas and ways of working: Unit 1

9. Divergence of Character List 5 ways in which dogs show divergence of character. Darwin’s big ideas and ways of working: Unit 1

10. Creating Models Darwin’s big ideas and ways of working: Unit 1

11. Extinction of less-improved forms • ‘the same genera and species [of fossil plants] are found in the most remote regions where the plants now in existence are entirely different.’ • (Darwin’s notebook on the transmutation of species) • Endangered species appear on the Red List e.g. Wild horse • http://www.arkive.org/przewalskis-horse/equus-ferus-przewalskii/description.html Darwin’s big ideas and ways of working: Unit 1

12. Extinction of wildlife occurs today because of: • Habitat degradation – clearing for housing/roads/mining • Human activities including hunting • Competition with domestic livestock/crops • Global warming • Flooding • Pollution – air, water, soil Darwin’s big ideas and ways of working: Unit 1

13. Darwin’s big ideas and ways of working: Unit 1